Well, im hoping it was dust. Whole camper is covered in it. Needs the exterrior cleaned again actually. I went after it with a hose, bucket of suds and a brush. Basically knocked off the first layer.
Proceeded to dewinterize, and start on the inside. Most of it had simply setteled, and cleaned it up with a dry cloth.
Pretty clean now, but has a bad dryer sheet smell that i cant stand. Likely get it to the park tomorrow, and finish the dirty work in a camping process this weekend.
Just went outside to pull my slides in, in the dark and under my exterrior house lights it looks awesome, shiny. A beer, dimmed lights, the radio, and a final interior cleanng inventory is a good time.